Syntheses of several new functionalized cagecompounds are described. The key steps of the reaction sequence are addition of lithiated methoxyallene 2 to cage diketone 1, preparation of dehydrated intermediate 5, and its ozonolysis leading to diester 7. Alternatively, 5 could be hydrolyzed to provide cagecompound 6 with a bisenone subunit. Via diol 9 chiral crown ether 11 could be prepared in low